caddyhttp: Match hostnames with wildcards to loggers (#3378)

* adding wildcard matching of logger names

* reordering precedence for more specific loggers to match first

* removing dependence on certmagic and extra loop

Co-authored-by: GregoryDosh <GregoryDosh@users.noreply.github.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/modules/caddyhttp/server.go b/modules/caddyhttp/server.go
index 55da253..38555e7 100644
--- a/modules/caddyhttp/server.go
+++ b/modules/caddyhttp/server.go
@@ -456,6 +456,20 @@ func (slc ServerLogConfig) getLoggerName(host string) string {
 	if loggerName, ok := slc.LoggerNames[host]; ok {
 		return loggerName
 	}
+
+	// Try matching wildcard domains if other non-specific loggers exist
+	labels := strings.Split(host, ".")
+	for i := range labels {
+		if labels[i] == "" {
+			continue
+		}
+		labels[i] = "*"
+		wildcardHost := strings.Join(labels, ".")
+		if loggerName, ok := slc.LoggerNames[wildcardHost]; ok {
+			return loggerName
+		}
+	}
+
 	return slc.DefaultLoggerName
 }